Businessman Marcos Parra and reporter Érika Treviño witness a dark discovery on the San Pedro border. From that moment on, their lives will change forever, and the peace of the community will be threatened.
As the wave of violence in Monterrey claims the lives of two women, Marcos denounces the mayor's ties to the Los Razos criminal group, and Gabriel and Adrián venture into the city's underworld.
Marcos visits the boss of Los del Desierto and tells him about his candidacy for mayor and his plan to keep San Pedro safe. Erika is kidnapped and given a lesson. Gabriel Maldonado adopts a new and dangerous "lifestyle."
